Elevator wiring system



Feb. ll, 1930. F. A. BoEDTcHl-:R 1,745,851

ELEVATOR WIRING SYSTEM Filed June 14, 1924 f/gl A; y ,f ATTO/efvPatented Feb. ll, 193@ e s if FRANZ A. BD ED'LGlfylll'y OF BERGENEIELD,NIE-EJ JERSEY, ASSIGNOR T0 OTIS ELEVATOB `Cf)lVIIAZNI'Y, OF JESSEY CTY.JERSEY, A CORPBATION OF NEW JERSEY ELEVATOR WIRING SYSTEM applicati@filed mme 14,

vV will eliminate a large proportion of the Wiring heretofore necessaryfor the accomplishment of particular purposes in elevator installation.

In the installation of elevators, as now practised, considerable wiringis required in the shaft. rlhis wiring serves numerous purposesdepending upon the type of elevator and also upon the signallinglsystems associated therewith. For example, attention may be directedtothe signa-lling circuit of a conventional elevator. i.` e., thecircuit by which signals of a waiting passenger may be transmitted tothe car operator and subsequently cancelled after thev passenger hasbeen admitted to the elevator.

In circuits of this character, it is quite common to provide up and downpush buttons at the several floors of ya building and a suitable signalvor signals in the car adapted to be operated selectively by thepressing of a push button at a floor. The selection of the particularsignal or the time at which the signal is given is usually controlled bya commutator in the overhead and Wires run from each push button ,to thecommutator and .to the several signals in the car or from each pushbutton to a commutator with a single Wiring connection to a singlesignal in the car. In a building of many iioors, the duplication of thewiring to the push buttons necessitates a large number of Wires intheshaft with attendant cost of installation and upkeep. It is not uncommonin the elevator signaling art moreover to provide passenger push buttonswhich are manually set by the prospective passenger and remain set untilthe service required is fulfilled. Resetting mechanisms for this purpose,invariably involve additional Wires leading to the individual pushbuttons from a commutator in the overhead and thus the wiring is furthercomplicated by individual WilS leading from each ypush buttpn andfrequently two wires tem @all Push button .in Order te egft re- 1924.seria-1 No. 720,075.

setting of .either the up or down pus-h buttons.

From these facts, it will be apparent that under present systems, thewiring in the shafting forms a considerable part lof installation costsand upkeep and it is highly important from a practical standpoint tomin-- imize in this wiring to the greatest possible eXtent. Attemptshave been made to minimize Wiring, but even the most satisfactory ofthese attemptshave necessitated the use of many wires.

As a result of careful research and experimentation, I have succeeded inproducing a novel system of Wiring capable of many uses in elevatorinstallation and through the employrnent of which the complicated wiringheretofore considered essential is made unnecessary and an unusuallysimple form .of wiring substituted. The principles underlying the systemof this invention are capable of incorporation in elevator systems ofwidely varying kinds and for different purposes, but .the underlyingprinciple of the invention remains the same in allY environments.Broadly stated, the invention consists in dividing an electrical feed orreturn Wire into a plurality of links or sections adapted to beconnected by switches interposed bet-ween the terminals of said sectionsor links and with each of which switches is associated a .tap line orlead leading .to -an electrical adjunct or appliance. Each switch isoperable either to connect the contiguous ends of adjacent links or toconnect the preceding link with the electrical adjunct. All of theelectrical adjuncts are connected .to a common feed .or return wire. Theswitches are adapted to be automatically controlled and shifted from oneposition to Ithe other automatically through kthe act of moving theelevator vertically of lthe shaft and in .the preferred form of theinvention, this 4automatic operation is a magnetic operation. In

other words, magnet is mounted on the elel electrical adjunct-s so thatone electrical ad- I* magnet will immediately function.

junct is made operable while all of the remaining adjuncts of said leadare made inoperable. To state the matter in another way, the movement ofthe car automatically effects a building up of a circuit to one of saidadjuncts and simultaneously so conditions the system that all otheradjuncts will be inopcrative.` This is the underlying principle of thepresent invention and from what has been said it will be apparent thatit is adapted for wide application.r

Inasmuch as it is not feasible to describe the invention in all of itsuses to which it may be applied, I will hereinafter specificallydescribe it in detail in conjunction with its use as a resetting systemfor elevator signals, but I wish it clearly understood that it is notlimited to this particular application.

However, in this connection', I carry out the present invention in aresetting system for elevator signals, which is referred to asillustrative, in substantially the following manner.

At stated intervals vertically of the shaft may be positioned switchesadapted to be actuated by a magnet carried by the elevator car. Each ofthese switches is adapted for two positions. In one position, eachswitch is adapted to complete a circuit at this pointJ through aresetting magnet of a push button mechanism. All the resetting magnetshave a common feed from the source of electrical energy so that one wireleading down the shaft may form a common feed for all of these magnets.A second wire leading from the source of electrical energy passes to themovable arm of the first switch and relatively short links of. singlewire connect the second contact of each preceding switch to the movableswitch arm of the next succeeding switch.'

As the car moves up the shaft, it automatically sets a-ll the magnetswitches of the down resetting circuit to positions to connect each linkwith a short branch circuit passing through the down resetting magnets,so that as the car stops at the top of the shaft, the only circuit leftcomplete is the circuit through the down resetting magnet for the topfloor Vand if the Circuit is not elsewhere broken by some other adjunct,this resetting As the car. moves down the shaft past the uppermostswitch, the switch is moved to break the branch circuit through theuppermost magnet and simultaneously connect the next following link ofthe circuit to the source of electrical energy for the purpose ofincluding in the circuit the next lower resetting magnet. 'l

As the car passes this next switch, it is in turn automatically moved tobreak the circuit through its corresponding magnet and to connect thenext link of the circuit to the source of supply. This operationcontinues as each switch is passed until the car arrives at the bottomof the shaft at which time all the branch circuits have been cut out.

Features of the invention, other than those specified, will be apparentfrom thev hereinafter detailed description and drawings, when read inconjunction with the appended claims.

Figure 1 of the accompanying drawings shows a wiring diagram of thesystem of the present invention as employedin circuits for restoringelevator signals, but it is to be understood that this showing isillustrative onlv iand does not define the limits of the inveriion.

Figure 2 of the accompanying drawings shows a magnetically controlledswitch which inaybe used in carrying out the present inyention, but thisswitch is to be understood as illustrative only and not as showing theonly current switchingmechanism that may be employed in this connection.

Inasmuch as it is not feasible in this specification to show all of theuses of which the invention is capable, I 'have' chosen for the purposeof illustration to show the same in conjunction with the resetting ofelevatoi`l signals and the drawing is in accordance with this viewpoint.I

In this drawing, I have shown the system complete for one elevator carand in a form adapted to reset both the up and down signals of aninstallation in a six story building and I have also shown suflicientwiring to illustrate the system as it would be constructed for two carsoperating in adjoining shafts, it being understood from thisshowing-'how the system may be enlarged'to Vprovide for anyv number ofcars.

In the showing of the drawing, car I is shown in full lines inconnection with the' down resetting side of the system and in dottedlines in connection with the up resetting Side. Y l

l designates any suitable source of electrical currentcapable ofactuating the resetting means and is here shown as a generator althoughin practice batteries may be eniployed. This Source of current supplymaybe positioned either in a basement or in an overhead, but is shown vinthe drawings as in the latter location.

A single feed wire 2 leads from the source of supply 1 down through theentire length 'lou of the shaft to the first floor. This is the mainfeed line and at several fioors, which are designated in the drawings,are the usual passenger-s button set mechanism which after being set bythe intended passenger are adapted to be reset through the employment fthe system shown. Nun'ierous resetting inea-ns may be employed, butV forthe purpose of this disclosure, the resetting means for each passengerspush button mechanism is shawn as embodying a magnet having' a coil..The down resetting magnet coils of the several are respectivelydesignated 6, 5d, 4d, 34 and 2, while the cooperating up resettingmagnets are ,designated el, 3, 2 and l, These magnets may serve to tripany conventional resetting means or shift annunciator drops or in anyother suitable way well known to the art may be constituted to effect a.resetting or cancellation of the signal which has been previously sentin a corresponding direction from the corresponding floor. All of themagnets are tapped directly into the main feed line 2, as shown in thedrawings, so as they are .directly fed from this line.

From the opposite pole of the source of supply 1 extend two additionalfeed lines 3 and 4. The feed line 3 may for present purposes be referredto as the return main for the down resetting magnets of car I. Thisreturn lin-e 3 extends from the source of power in the overhead .downthe shaft to the second floor. The return l for the 'up resetting imagnets of car I extends down the shaft from the source of power to thefirst floor and thence u the shaft again to the fifth door in the instalation shown and for the purpose of clear description that portion ofthe return 4, which extends up the shaft will bc ret-erred to by thereference .character 4.

Included in the return 3 for the down resetting ma nets of car I is aplurality of magnot operated switches, one of which is posi- A tioned ateach floor of the building. These switches are designated 60th 50, 40,30d and 2G@ for the res 'tive floors. Similar switches 50, 40, 30, 20and l0 are included in the portion 4 of the up return circuit 4 for carI. These switches are so positioned in the shaft that they are adaptedto be magnetically operated 'by a magnet 5 supported on and carried bythe car I. in the drawing, the magnet is shown as mounted on top of thecar and the switches are so vdisposed in the shaft that when the car isat rest at a floor, the magnet will 'be positioned above the downresetting switch of that floor and below the up resetting switch of saidfloor. In other words, when the car is at rest at a floor, it wii heinterme diate knwo adjacent switches but actually cooperating withneither.

"The parte are se assembled with relation te one. another however thatas the Aear moves up and dawn the shaft, the magnet A5 on .said

car will successively serve to automatically operate through magneticforce the resetting switches which relate to that particular car, Eachswitch embodies a switch arm 6 pivoted intermediate its ends at 7, sothat those portions of the switch extending at opposite sides of thepivot form armatures for the magnet on the car so that as the carapproaches one side of the pivotthat arm of the switch first passed willbe drawn by the ma griet to shift the arm in one direction while soon asthe magnet passes the pivot the 0ppositely projecting portion of saidarm will be directed by the magnet to shift the switch arm in theopposite direction. Suitable stops, not shown, are provided for limitingthe movement of the switch arm in both directions to eliminateovertravel.

Each of these switches moreover is a double pole switch, that is to say,it is adapted to. close a circuit when in either of the positionsreferred to. and to this end, each switch is provided with two contacts8 and 9. The switches are so included in the return lead 3 that the wireleading from the source 0f power 1 passes to the pivot 7 of the Switch60d. This return is continued by connecting the contact 8 to the pivotof the switch 59d, by connecting the contact 8 of the switch 50 to thepivot of the switch 40d and so on down the shaft until the pivot of theswitch d is reached. The contact 9 of each of the down resetting;`switches is directly connected to the resetting magnet of thecorresponding floor. The up resetting switches are connectcd in return 4in the same electrical manner,

t may thus be graphically stated that the returns 3 and 4 are composed.of a plurali-ty of links or sections adapted to be Connected ordisconnected with a source of current supply through correspondingoperation of the switches in these circuits. For example, as shown inthe drawings. the switches 6091, 50d, and 30 are all set in such aposition that current may be fed from the feed 2 through resettingmagnet 2d and through the switch Q0 back to the source of supply.

It will be noted however that the switches 40, 30 and 20 are sopositioned that the links which join these switches `are broken from themain return 4. although the link between the switch 20 and 1,0 isincluded in said circuit by virtue of the particular position of theyarm of 4 the switch 10E. It is because of the abilita te @sunset anddseenneet said links to build up or break down the circuits of whichthey form a part, which marks efficiency lof the system of thisinvention and enables it to carry out these functions with anunbelievably sinaH--nuinher et' wines er: tending vertically of .theshaft,

Its usefulness in .this regard iS not limited i0 the epe-ration ofresetting devices., its extreme simplicity is apparent from showing inthis respect.

The operation of the system in conjunction with the movements of car Iwill now be described, but it may here be noted that in the resettingsystem, it is usually desirable to make the resetting conditional uponthe giving of the service for which the signal has been previously set.in other words, upon the taking of a passenger onto the car. For thisreason, in order to make the system shown thoroughly practical in thisconnection, I have included switches 11 and 12 in the returns 3 and 4.These switches may be of any suitable construction and operated in anyappropriate manner, but, in practice7 they are preferably operated by agovernor' controlled from some part of the car installation and in theinstallations which have been made they have been usually controlled bya governor which serves to automaticall v close the switches after thecar has been stopped. subsequently started and has commenced toaccelerate. I find this method of operation highly efficient for reasonswhich will be manifest to those skilled in the art.

In the showing of the drawings. car I has moved down the shaft andstopped at the second floor to take on a passenger. During this movementdown the shaft, the magnet 5 carried thereby has passed the severalswitches d, 50d, 40d and 30 and in so doing has set them to connect theseveral links of the return circuit with the pivot of the switch arm ofthe second floor switch 20d. 'I he circuit is complete through theresetting magnet 2d except at the governor switch 11. which, is anormally open switch and is shown open.

Now, if the car starts and continues its downward movement to the firstfloor. the governor associated with the car will he operated as soon asthe car starts and commences to accelerate and the parts are so timedthat the closing of the switch 11 will be effect-ed before the magnet 5reaches the switch 20d. As soon as the switch 11 is closed, an impulseof current will pass through the circuit, which is thus established andwill energize the magnet 2fl for the purpose of effecting resetting ofthe associated signal.

It may be here stated for the purpose of illustration, that the switch11 may be of a character such as is shown in my issued Patent No.1,333,240, although any other form of governor controlled switch whichwill function for a like purpose may be employed without departing fromthis invention.

The switch 11 preferably however makes but a momentary contactsuiiiciently long in duration to insure proper energizing of the magnetand actuating of the adjunctive resetting devices. I prefer to employbut a momentary impulse in order to economize on current consumption andalso to preclude overheating.

As the car continues to move down the shaft to the first floor, it willin passing the switch 20d swing it into the dotted line position shownand thus disconnected the magnet 2d from the return leaving all of themagnets of the down resetting circuit disconnected from said return.

It will be noted however that as the car has passed down the shaft fromthe sixth floor past the switches 50, 40, 30, 20lx and 10, that it hasautomatically shifted all of the arms of these switches into positionsto engage with the cont-acts 9 which are connected with thecorresponding up resetting magnets. Thus, as the car reverses its traveland starts in an upward direction and moves, e. g., to the second floorand there stops, it will be apparent that in passing the switch 10 itwill automatically shift the arm of the switch to engage the contact 9,thus completing the circuit from the returns 4 and 4 to the pivot of theswitch 20u which is connected through the switch arm to the contact 9 ofthe magnet 2, If a car stops at the second floor` and subsequentlystarts, the operation will, with the particular kind of governor whichhasbeen described, immediately close the switch 12 and cause a currentimpulse to be passed through the magnet 2 to reset the signal which haspreviously caused the car to stop at the second iioor. Continuing up theshaft, the car will in turn shift the switch arms of the successiveswitches in order to build up a resetting circuit behind it, while aheadof it the resetting circuit is incomplete.

It may be here noted that the governors 11 and 12 are so associated withthe car that they will operate co-directional therewith. In other words,the parts are so installed that the governor 11 will operate only duringthe down movement of the car while the governor 12 will operate onlyduring the up movement.

The same result can of course be obtained by placing a single governorswitch at m and including directional switches at 11 and 12 instead ofmaking them governor switches. This will be apparent as an alternativeto those skilled in the art. Other changes will readily presentthemselves to such experts and I am aware of many changes which might bemade in this system without departing from the general arrangement orfrom the invention. but it is manifestly not feasible to point out hereall of the changes which might be made and which would probably be madein adapting the invention to different environments. I will at this timeexplain the theorv and show one practical wiring diagram which Iconsider to be one of the best practical forms of the invention asemployed in a signal resetting system.

By making the switches 11 and 12 codirectional with the movements of thecar, it will be apparent that no up resetting magnets will be energizedduring the down movements of the car and no down resetting magnets willbe energized during the up movements of the car. In other words, therewill be no untimely cancellation of signals.

In the drawings, I have shown enough of the wiring for a second cardesignated car II to illustrate how the system may be enlarged to applyto more than one car and this arrangement can manifestly be duplicatedfor any number of cars. In view of the simplicity of the arrangement, itis not thought necessary to describe the manner in which the second carcauses functioning of the system since it operates in the same manner ashas been described with reference to car I.

It may be here noted however that in the system as shown, it is assumedthat only one up push button and one down push button are positioned ateach floor for the particular` bank of elevators with which the systemis shown as associated. If a plurality of push buttons are employed ateach floor for both up and down directions, the only change that wouldbe necessary would be to duplicate the resetting magnets in multiple,but this is an arrangement that would not be ordinarily used.

It will be apparent from the detailed description of the invention asapplied to resetting-systems for elevators that the system is unusuallysimple and embodies few wires extending vertically of the shaft. As amatter of factin a one car installation, for example, and for any numberof floors, the only wires for resetting which would be required to ei;-t'end longitudinally of the shaft are the main feed wire 2 and thereturn wires 3, 4 and 4. In other Words, four Wires can accomplish inthis system for an installation through a large number of floors whereit has heretofore been necessary to employ substantially twice thenumber of wires as there are floors, one set of wires being for the uprestoring and another set for the down restoring. This will give someidea of the importance of the present invention from a commercialstandpoint. For example, in an installation of six floors as shown,`applicant may employ four vertical leads for the resetting and one ofthese vertical leads may be the main feed which also feeds the settingcircuits.

According to prior practice, the same installation would include atleast thirteen Wires extending vertically of the shaft. In other words,I am enabled to employ but a small fraction of the wiring heretoforenecessary to accomplish the same purpose and consequently am able toinstall these circuits at a far lower cost than has heretofore beenpossible, both from the standpoint of material employed and from themore important standpoint of labor and upkeep.

It is to be noted that by the greatly simplified form of constructionillustrated, the well known commutator machines generally used inconnection with the resetting circuits are entirely eliminated and atthe same time a thoroughly selective system is produced. There is as amatter of fact a very nice cooperation between the up and down switches.lllhile one circuit is being built up the other circuit is being brokenup into its constituent sections or links lVhile a circuit appropriateto the particular direction in which the ear moving will be built up tosupply an electrical adjunct or instrument ahead ofthe rar, while theadjuncts or instruments which the car has passed will be automaticallycut out of the main circuit. Only one instrunient or adjunct isoperativo at any one time from any particular car, although some otheradjunct or instrument may be and probably would be in practiceresponsive to the operations of some other car of the bank.

It will be noted that I have shown switches ll included in the tap lineswhich also includes the resetting magnet l. One of these switches may heassociated with the tap lines of all the other resetting magnets but oneis simply shown in coniunction with the magnet l for the purpose ofillustration. These switches l-l are preferably of the character shownand described in my prior patent hereinhefore referred to and aredesignated l2 in ,Fixture 4 of the drawings of such patent. This typo ofswitch is a mechanically locked switch and is manually locked' as whenthe prospective passenger presses a push button. Vhen the magnet isenergized, the switch is automatically opened. Any other type of switchmay be used in this connection or this switch may be omitted, but Iprefer to use it in practice for reasons which will be apparent to thoseskilled in the art.

From the illustrative showing of the invention which has been advanced,it will appear that the broad underlying principle thereof consists inutilizing one lead to operate 'a number of electrical devices positionedin sc- :pience vertically of the shaft and to utilize :i moving elementon the elevator successively and automatically control. switchesincluded in said lead wherebyv the passage of the elevatorlongitudinally of the shaft automatically renders the electricaladjuncts which it passes inoperative and sin'iultancously prepares thenent preceding adjunct for operation. This principle is manifestly notlimited for eniploymcnt to resetting systems, but may be carried out ina wide variety of uses such, for example, in setting systems or inautomatic control systems wherein elevator cars are operatedautomatically and without an attendant as well as in a variety of otheruses in the elevator art which will readily suggest themselves to thosesitilled in this art. For those reasons, I have simply shown onevthoroughly etlicient and practical embodiment of the invention and wishit clearly understood that the invention as broadly novel as iscommensurate with the ppended claims Having thus fully described theinvention what I claim as new and desire to secure by Letters Patent is:

l. A wiring system for elevators embodying a source of current supply, aplurality ot' electrically operated adj uncts, a main leading from thesource of current supply to said adjuncts, a second main leading fromthe source of current supply and comprising a succession of sections, atwo-way switch hetween each two adjacent sections and associated withone of said adjuncts, whereby each switch will serve in one position todisconnect two adjacent sections and simultaneously connect thecorresponding adjunct to the main and, in another position, todisconnect said adjunct and join said adjacent sections, and meanscarried by the elevator car for operating said swi ches, said switchesbeing shiftable only when operated by the said means on the car.

2. A wiring system for elevators embodying a source of current supply, aplurality ot electrically operated adjuncts, a main leading from thesource of current supply to said adjuncts, a second main leading tronithe source of current supply and comprising a succession of sections, atwo-way switch between each two adjacent sections and associated withone of said adjuncts, whereby each switch will serve in one position todisconnect two adjacent sections and simultaneously connect thecorresponding adjunct to the main and, in another position, todisconnect said adjunct and join said adjacent sections, andelectromagnetic means carried by the elevator car for operating saidswitches, said switches being shiftable only when operated by the saidmeans on the car.

3. A wiring system for elevators embodying a plurality of switchesarranged in spaced relation vertically of the elevator shaft, certain ofwhich are appropriate to up movement of the car and others of which areappropriate to down movement of the car, a source of current supply, anelectrical conductor leading from said source and including all of theup switches in series, an electrical conductor leading from said sourceand including all of the down switches in series, a plurality o't' upelectrical devices connected to the up switches, a plurality of downelectrical devices connected to the down switches, electrical feed orreturn connections between said adjuncts and the source, electromagneticmeans movable in unison with the car for operating all ot said switches,and means for causing the operation of only the devices for theappropriate direction of movement of the car.

4. A wiring system for elevators embodying a plurality of switchesarranged in spaced relation vertically of the elevator shaft, certain ofwhich are appropriate to up7 movement of the car and others of which areappropriate to down movement of the car, a source ot' current supply, anelectrical conductor leading from said source and including all of theup switches in series, an electrical conductor leading from said sourceand including all of the down switches in series, a plurality of upelectrical devices connected to the up switches, a plurality of 'down7electrical devices connected to the down switches, electrical feed orreturn connections between said adjuncts and the source, a singleelectromagnet mounted on and carried by the ear for operating all ofsaid switches in succession, and means for causing the operation of onlythe devices for the appropriate direction of movement of the car.

In a wiring system for elevators, a plurality of two-way switchescorresponding to several floors ot a building and arranged in spacedrelation vertically of the shaft, a source ot current supply, anelectrical conductor leading' from the source of current supply andembodying a succession of sections respectively connecting thesuccessive switches to one another and adapted to collectively connectthe switches in series with the current source when the switches are inpositions to bridge the adjacent termini of adjacent conductor sections,a plurality of electrical devices electrically connected to poles of theswitches which are out of circuit when all of the sections are inseries, a common current return for said devices, and means carried bythe car for operating said switches to accumulatively connect thesections in series when the car moves in one direction, and tosuccessively place said devices individually in series with acorrespondin gly decreasing number of said sections when the car movesin the opposite direction, each et said switches being constituted tomaintain the position into which it is operated until a subsequentoperation.

G. In a wiring system for elevators, a plurality of n'iagneticallyoperable two-way switches corresponding to several floors of a buildingand arranged in spaced relation vertically of the shalt, a. source otcurrent supply, an electrical conductor leading from the source ofcurrent supply and embodying a succession ot sections respectivelyconnecting the successive switches to one another and adapted tocollectively connect the switches in series with the current source whenthe switches are in positions to bridge the adjacent termini of adjacentconductor sections, a plurality ot' electrical devices electricallyconnected to poles of the switches which are out of circuit when all otthe sections are in series, a common current return for said devices,and electromagnetic means carried by the car for operating said switchesto accuniulatively connect the sections in series when the car nieves inone direction and to successivelv place said devices indi idually inseries with a correspondingly decreasing number of said sections whenthe car moves in the opposite direction, each of said switches beingconstituted to maintain the position into which it is operated until asubsequent operation.

7. A wiring system for elevators embodying a source of current supply,at least two main conductors leading from the source of suoplyvertically of the shaft, branch conductors extending between tile mainconductors in multiple and including electrically operated adjuncts, atwo-way switch positioned at the junction ot' cach branch with one mainto divide said main into a succession of sections, each of said switchescomprising line and branch contacts, thil turnier of which are connectedto the adjacent sections, and the latter of which are connected to saidbranch conductors, and means carried by the car for shifting theswitchesI to connect the sections through the line contacts andsimultaneously cut olf the branches, and to successively andindividually connect the branches to the main and cut otf the mainbeyond the connected branch, said switches boing shiftable only whenoperated by the means on the car.

8. A wiring system for elevators embodying a source of current supply,at least two main conductors leading from the source of supplyvertically of the shaft, branch conductors eX- tending between the mainconductors in multiple and including electrically operated adjuncts, anelectro-magnetically operated twoway switch positioned at the junctionol each branch with one main to divide said main into a succession ofsections, each of said switche comprising line and branch contacts, theformer of which are connected to the adjacent sections, and the latterof which are connected to said branch conductors, and a magnet common toall the switches and carried by the car for shifting the switches toconnect the sections through the line contacts and simultaneously cutotf the branches, and to siufcessively and individually connect thebranches to the main and cut oil' the main beyond the counected branch,said switches being shittable only when operated by the means on thecar.

A wiring system for elevators embodying a source of current supply,electrical operated adjuncts positioned at several consecutive lloors ofthe building in which the system is installed, a main conductor leadingfrom the source of supply vertically along the shaft, branch conductorstapped from said main at the several tioors and leading to the adjunctsat said floors, a second main conductor leading from the source ofsupply vertically along the shaft and divided into sections extendingbetween the several floors in succession, a magnetically operated twoway switch mounted in the elevator shaft between the adjacent ends ofeach two sections with its line contacts connected to said sections, abranch connection leading from each adunct to a branch Contact of thecorres ending switch, whereby each of said ches is adapted when in oneposition to connect the adjacent ends ot two sections and simultaneouslycut out the branch connection leading to the corresponding adjunct andwhen in another position to disconnect said sections and connect thebranch of the corresponding adjunct to the main, and a magnet movable inunison with the elevator' car and adapted to operate said switches insuccession, when the magnet is moved past the switches.

l0. A wiring system for elevators embodyin g a source of current supply,electrical operated adjuncts positioned at several consecutive floors ofthe building in which the system is installed, a main conductor leading'from the source of supply vertically along the shaft, branch conductorstapped from said main at the several floors and leading to the adjunctsat said floors, a second main conductor leading from the source ofsupply vertically along the shaft and divided into sections extendingbetween the several floors in succession, a magnetically operated twoway switch mounted in the elevator shaft between the adjacent ends ofeach two sections with its line contacts connected to said sections, abranch connection leading from each adjunct to a branch Contact of thecorresponding switch, whereby each of said switches is adapted when inone position to connect the adjacent ends of two sections andsimultaneously cut out the branch `connection leading to thecorresponding adjunct and when in another position to disconnect saidsections and connect the branch of the corresponding adjunct to themain, and a magnet mounted on and carried by the elevator car andadapted to operate said switches in succession when the magnet is movedpast the switches.

l1. In a wiring system for elevators, a plurality of magneticallyoperable two-way switches corresponding to the yseveral floors of abuilding and arranged in spaced rclationy a .source of current supply,an electrical coilductor leading from the source of current supply andembodying a succession of scctions respectively connecting thesuccessive switches t0 one another and adapted to collectively connectthe switches in, series with the current source when the switches are inpositions to bridge the adjacent termini of adjacent conductor sections,a plurality of electrical devices electrically connected to poles of theswitches which are out of circuit when all the 'sections are in series,a common current return for said devices, and electromagnetic meansmovable in timed relation with the car past the switches for operatingsaid switches to accumulatively connect the sections in series when thecar moves in one direction and to successively pl'ace said de'- vicesindividually in lseries with a correspondnio ingly decreasing number ofsaid sections when the car moves in the opposite direction, each of saidswitches being constituted to maintain the position in to which it isoperated until a subsequent operation.

l2. A wiring system for elevators comprising a source of current, aconductor leading from one side of said source, a plurality ofelectrical devices, one for each Hoor, connected to said conductor,another' conductor connected to the other side of said source, saidother conductor comprising a plurality of conductor sections, one foreach floor, a plurality of switching mechanisms, one for each floor,operable to connect said electrical de vices to and disconnect them fromthe corresponding conductor sections and to connect said conductorsections in series relation and disconnect them from one another, andmeans moved in accordance with car movement for causing the successiveoperation ot said switching mechanisms to disconnect the correspondingdevices from the corresponding conductor sections and connect saidsections in series relation, during travel of the car in one direction,and to disconnect said conductor sections from each other and connectthe corresponding devices to the corresponding sections, during travelof the car in the opposite direction, each of said switching mechanisms,once operated by said means moved in accordance with car travel duringtravel of the car in either direction, remaining so operated until againoperated by said means during travel of the car in the oppositedirection.

13. A wiring system for elevators comprising a plurality of switchmechanisms corresponding to the several floors of a building, a sourceof current supply, an electrical conductor leading from the source ofcurrent supply and embodying a succession of conductor sectionsrespectively connecting the successive switching mechanisms to oneanother and adapted to collectively connect said mechanisms in serieswith the current source when the switching mechanisms are in conditionsto bridge adjacent termini of the respective conductor sections, aplurality of electrical devices, one for each floor, an electricalconductor leading from the source of current supply to all of saiddevices, each of said devices being connected to the switching mechanismof the corresponding floor to be energized through said mechanism whensaid switching mechanism is in a condition to disconnect the termini ofthe conductor sections with which it is associated, and electromagneticmeans movable in timed relation with the elevator car past the switchingmechanisms for causing the operation of the switching mechanisms todisconnect the sections and connect the electrical devices to theconductor which embodies said sections, each of said switchingmechanisms being con- FRANZ A. BOEDTCHER.

